R90 - 160N / R90 - 160I / R90 - 160NE / R90 - 160IE
http://www.ingersollrandproducts.com
9
10.0 MAINTENANCE
Air-cooled Cooler Removal
Ensure that the compressor is isolated from the
compressed air system and is vented of all pressure.
Ensure that the main power disconnect switch is
locked off and tagged.
For any required lifting of air compressor parts or
required tools, always use the proper certified lifting
equipment, and employ sound working principles.
Drain the oil from the oil cooler by removing the M22
hex plug located at the front of the air compressor,
and lower side of the oil cooler.
Remove all hoses, pipes, and sensors from the
coolers.
Remove the access panels on the sides of the cooler
plenum
Properly secure the air aftercooler and remove the
(4) nuts from the (2) bolts at the upper sides of the
cooler.
Remove the (2) nuts from the bolts at the bottom of
the cooler.
Carefully remove the air aftercooler.
Properly secure the oil cooler and remove the (4)
nuts from the (2) bolts at the upper sides of the
cooler.
Remove the (2) nuts from the bolts at the bottom of
the cooler.
Carefully remove the oil cooler.
Re-install the M22 oil drain plug to 65 N-m (48 Ft-
Lbs).
WARNING
Strong cleaners can harm aluminum coolers and
associated parts. Use the appropriate cleaners for
aluminum, and follow the manufacturer’s instructions
closely. Always wear the appropriate safety equipment.
Air-cooled Cooler Installation
Ensure that the compressor is isolated from the
compressed air system and is vented of all pressure.
Ensure that the main power disconnect switch is
locked off and tagged.
For any required lifting of air compressor parts or
required tools, always use the proper certified lifting
equipment, and employ sound working principles.
Carefully place the oil cooler in its proper location
and install the (2) sets of lower fasteners, tightly.
Install the (2) sets of upper side fasteners, finger tight
+ ¼ turn. Next add the second nut to each tightly.
This second nut is used to lock the first in place. It is
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important the first nut is not too tight so it can allow
the cooler to expand and contract without stressing
the cooler’s brazed joints.
Ensure the rubber seal on the air aftercooler is in
place on the cooler and in good condition.
Carefully place the air aftercooler cooler in its proper
location and install the (2) sets of lower fasteners,
tightly.
Install the (2) sets of upper side fasteners, finger tight
+ ¼ turn. Next add the second nut to each tightly.
This second nut is used to lock the first in place. It is
important the first nut is not too tight so it can allow
the cooler to expand and contract without stressing
the cooler’s brazed joints.
Re-attach all hoses, pipes and sensors, and properly
torque according to the table shown…
Replace the access panels on the sides of the cooler
plenum.
Refill the machine with oil to the proper level.
Water-cooled Cooler Cleaning (for both Clean & Harsh
Water Options)
A periodic inspection and maintenance program should
be implemented for water cooled heat exchangers. It
is recommended that you contact
Ingersoll Rand
for
cleaning services should you not have experience and
equipment to do this work.
Pre-Inspection:
If water inlet lines have strainers, inspect them and
replace or clean as required.
Cleaning:
Mineral scale may be removed with a suitable de-
scaling agent containing amidosulphuric acid + citric
acid and Neutralit solutions for cleaning the coolers.
As an alternative, any weak acid mixed with water in
the ratio of 1:4 may be used.
Fouling should be removed with a suitable detergent
in hot water.
Back flush the cooler with a flow rate at least 1.5
times the normal flow rate.
After using any cleaning solution, thoroughly flush
out all chemicals with clean water before returning
the cooler to service.
Mechanical cleaning methods are not recommended
as damage to the internal passages may occur.
Post-Cleaning Inspection:
Examine the cooler for erosion or corrosion.
Airend bearings
Airend bearings are lubricated by the compressor coolant
and require no maintenance.
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